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https://issues.apache.org/jira/browse/LUCENE-3230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera resolved LUCENE-3230.
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    Resolution: Won't Fix

I opened LUCENE-3237 to improve how fsync works. After we move sync() to 
IndexOutput, a public static sync() API won't make much sense.

> Make FSDirectory.fsync() public and static
> ------------------------------------------
>
>                 Key: LUCENE-3230
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3230
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: core/store
>            Reporter: Shai Erera
>            Assignee: Shai Erera
>            Priority: Minor
>             Fix For: 3.3, 4.0
>
>
> I find FSDirectory.fsync() (today protected and instance method) very useful 
> as a utility to sync() files. I'd like create a FSDirectory.sync() utility 
> which contains the exact same impl of FSDir.fsync(), and have the latter call 
> it. We can have it part of IOUtils too, as it's a completely standalone 
> utility.
> I would get rid of FSDir.fsync() if it wasn't protected (as if encouraging 
> people to override it). I doubt anyone really overrides it (our core 
> Directories don't).
> Also, while reviewing the code, I noticed that if IOE occurs, the code sleeps 
> for 5 msec. If an InterruptedException occurs then, it immediately throws 
> ThreadIE, completely ignoring the fact that it slept due to IOE. Shouldn't we 
> at least pass IOE.getMessage() on ThreadIE?
> The patch is trivial, so I'd like to get some feedback before I post it.

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